2 EXTRACTION OF TEETH. 



to assure a prompt recovery, by the removal of the effects 

 of the disease of the tooth. 



The removal of molars may therefore involve extraction 

 with forceps, trephining the dental alveolus and repulsion 

 of the tooth and trephining of the sinuses because of em- 

 pyema or other pathologic conditions referable to the dental 

 affection ; consequently all of these should be studied as re- 

 lated topics. 



Instruments. Extracting forceps, fulcra of various 

 sizes, mouth .speculum with abundant lateral working room, 

 exporteur forceps, tooth pick, splinter forceps, reflecting lamp. 



Technic. In simple cases with a quiet animal the pa- 

 tient may be suflSciently confined by being backed into a 

 corner or very much better by securing in stocks. In com- 

 plicated cases or verj' resistant animals it is best to place 

 upon the operating table or in default of this, cast and secure 

 in lateral decubitis on the opposite side to the affected tooth. 



Apply the speculum and identify the di.seased tooth by 

 manual exploration ; determine if the tooth is of unnatural 

 size or form, if it is loose, if the gums are separated from the 

 neck at anj' point, if it is out of line with the other teeth in 

 the row, if it is painful to the touch, if it be .split, etc. An 

 external tooth fi.stula or a tumefaction over the aiifected 

 member may aid in distinguishing it. Aid maj^ al.so be had 

 by illuminating the mouth with a reflecting electric or other 

 lamp. 



Remove any accumulations of partially masticated food by 

 means of the toothpick or witli the fingers. 



For extracting molars use forceps acting as a lever of the 

 first claiss, with a fulcrum having a plane and a convex sur- 

 face ; for the premolars use forceps acting as a lever of the 

 second class. In case of the superior premolars some prefer 

 forceps bent on the flat as .shown in Plate II, because if 

 straight the forceps handles strike against the superior in- 

 cisors and hinder the deep fixation of the forceps jaws upon 

 the tooth crown. 



